Saw



May 26, 19.31.` .1. E. O'NEILL SAW ' Filed March 19, 1929 'lll/fil/lllllllll. v1.12 (Il,

INVENTOR JOHN E. UWE/LL.

l ATTORNEY Patented May 26, 1931 -:A .'.Lyil

UNITED STATES JOHN E. oNE-ILL, or comme', NEW Yom:

SAW" Application mea March 19, i929.V serial N6.Vs4s,17i1. r E y.

This invention relates to improvements in saws and more particularly to the means for securing saw blades in saw frames.

The object of the invention is to compensate for slight irregularities in the length of the blades and to keep them taut so as to prevent them from buckling while they are in use.

Another object is to securely lock a saw 1o blade in its frame so as to prevent accidental disengagement of the parts.

The above and other objects may beattain-ed by the use of my invention which embodies among its features a detachable socket l5 arranged for adjustabley engagement with one end of a saw frame, a lever pivoted to the socket and provided with a blade engaging element so positioned that when the lever is in blade-holding position the tension exerted by the blade will securely lock the lever in place.

In the drawings:

Fig. 1 is a side view of a saw equipped with my improved blade-securing lock;

Fig. 2 is an enlarged fragmentary view of the frame and blade showing the lock in detail, portions of the latter being broken away to more clearly illustrate the details of construction;

Fig. 3 is a vertical sectional view taken yon the line 3 3 ofF ig. 2;

Fig.l 4 is a horizontal sectional view taken on the line 4-4 of Fig. 2; and

Fig. 5 is a horizontal sectional view taken on the line 5 5 of Fig. 2. v

Referring to the drawings in detail, the vsaw frame 10 which may be of any preferred type is provided at its forward end with an outwardly extending arm 11 which is slotted to receive the forward end of a saw blade 14.

The latter is provided with a transversely extending stud 13 for engagement in a notch 12 formed in the slotted end of the arm 11. A handle 15 is secured to the opposite end of the frame 10 and projecting outwardly from the frame in the same direction as the arm 11 is an arm 16 which is provided at its free end with a plurality of teeth 17 for cooperation with a blade-securing lock 18 to be more fully hereinafter described.

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The lock 18 above referred to comprises a socket member 20 which is substantially U shaped in cross-section and is provided adj acent oneend with a block 21,`the inner end of n which is vprovided Vwith teeth 22 for coopera- "55 tion with the teeth 17 on the arm-16 in adjustably supporting the lock inV position .onthe saw frame. As illustratedin Figs. 3 and 4, vthe block 21 is slotted at`23- to accommodate the saw blade 14 while the outer sides of the 5b block are embraced by the lower ends of the socket Vmember 2O,` it bein `understood that the back ofthe socket mem er'iscut away at 24 to accommodate thesaw blade.' Pivoted r j at'25 to` the socket member20 is a lever 2 6 65 which is formed -witlranotch 27 for the reception of a stud 28 carried by the sawy blade,

it being understood that the lever is provided `with a slot 30'for accommodating the end of thesaw blade. f 'f A f iv In using the'device it willv be seen that one end'of the saw 'blade is fitted inthe arm-11 of the saw frame 10 so that the stud 13 carried `by the blade engages in the notch 12. I Upon swinging the lever 265011 itsk pivot25 75 'into the position shown in dotted lines in Fig.

2, it will be evident that the stud 28 at the opposite endofthe saw blade Vmay be easily entered into thenotch 27. i After'adjusting the saw blade in this manner with the socket 'in' position Von, the arm 16 of the saw frame the lever 26 is thrown into the position shown in full lines in Fig. 2, thus movingthe saw blade in toproper positioninthe groove 23 Y of the block'l21. When? the end `29 of theta-5 lever moves into engagement Vwith the back of the socket 2Q it'will be evident that the stud 28 will be moved into such a position thatthe greater the tension on the saw blade the more securely will 'the elid 29 of lthelever .50

engage the socket'20. In this manner the blade isV securely locked inthe frame and yet may be easily and quicklydetached, should it becomes necessary. A r

i If, after. use, the saw` bladeA stretches or 'should anew blade be substituted which vadifferences in the length of the blade may be compensated for, it being understood that the fit of the socket 20 on the arm 16 is such as to permit it to swing back toward the saw handle When the lock is in released position, as illustrated in the dot and dash position shown in Fig. 2. V

While in theforegoing I have shovvn` and described the preferred embodiment of my invention it is to be understood that minor changes in the details of construction, com-V bination and arrangement of parts may be resorted to Without departing from the spirit and scope of my invention as claimed.

What I claim and desire to secure by Letters Patent is:

1. A saw :trame having a pair of arms, a savv blade having one end removably secured to one of the arms, teeth on'the end of theI opposite arm, a handle on the toothed arm, a transversely U-shaped socket removably fitted on the toothed arm and adapted for swinging movement toward the handle, teeth on the socket for cooperation with those on the arm for holding the socket in adjusted position on the arm, and means carried by the socket for engagement With the opposite end of the saw blade and holding it in place in the frame, y

2. The combination with a Ushaped frame, the end of one armof which is slotted and notched to receive one end of a saw blade, and teeth on the end of the opposite arm, of a transversely U-shaped socket removably itted on the toothed arm and adapted to swing away from the toothed arm, teeth on the socket cooperating With those on the arm in holding the socket in various positions aWay from the toothed arm, and a slotted and notched lever pivoted to the socket for receiving the opposite end of the savv blade.

3. The combination with a U-shaped frame, the end of one arm of which is slotted and notched to receive and retain one endof a saw blade, and teeth on the end of the opposite arm, of a transversely U-shaped socket removably litted on the toothed arm, one end of said socket being movable in one direction away from said arm, a toothed block closing the movable end of the socket, the teeth on the arm cooperating with those on the block in holding the socket in various adjusted positions on and against movement relative to the arm, the block being provided with a y groovel for accommodating Vthe saW blade, a lever pivoted to the socket, said lever being slotted and notched to accommodate and retain the saw blade, and a stop on the lever for engaging the socket to prevent movement of the lever in one direction beyond a predetermined position.

JOHN E.` ONEILL. 

